Valve for automatic stoker-controllers.



w. J. KENNEY.

VALVE FOR AUTOMATIC STOKER CONTROLLERS. APPLICATION man OCT. 10. 1914.

Patented Dec. 12, 1916.

2 SHEETS-SHEET I.

W. J- KENNEY.

VALVE FOR AUTOMATIC STQKER CONTROLLERS. APPLICATION FILED 0c'T.10. I914.

Patented Dec. 12, 1916.

WILLIAM J. KENNEY, OF WILME'ITE, ILLINOIS, ASSIGNOB TO UNDER-FEED STOKERCOMPANY OF AMERICA, OF CHICAGO, ILLINOIS, A CORPORATION OF NEW JERSEY.

VALVE FOR AUTOMATIC STOKER-COINTROLLERS.

, Specification of Letters Patent.

Application filed October 10, 1914. Serial No. 866,029.

To all whom it may concern 1 Be it known that I, WILLIAM J. KENNEY, acitizen of the United States, residing at Wilmette, county of Cook, andState of Illinois, have invented a certain new and useful Improvement inValves forAutomatic Stoker-Controllers, and declare the following to bea full, clear, and exact description of the same, such as will enableothers to skilled in the art to which it pertains to make and use thesame, reference being had to the accompanying drawings, which form apart of this specification.

My invention relates to means for controlling the admission of motivefluid to and its exhaust from the cylinder of the charging mechanism ofan underfeed stoker and has for its object to simplify and improve thevalve forming part of such means.

Specifically considered, my invention relates to mechanism of the typeshown in Pat ent 9513 10 granted March 8, 1910, and may be said to havefor its object to improve the valve forming part of such mechanism, 2-5so as toincrease the capacity of the valve without increasing its size.

The various features of novelty whereby my invention is characterizedwill hereinafter be pointed out with particularity in the so claims;but, for a full understanding of my invention and of its object andadvantages, reference may be had to the following detailed descriptiontaken in connection with the accompanying drawings, wherein:

Figure 1 is a side view of the charging cylinder of the stoker and themeans for automatically controlling the admission and exhaust of themotive fluid; Fig. 2 is a vertical axial section through the controllingvalve to and the parts immediately adjacent thereto. Fig. 3 is a sectiontaken on line 3-3 of Fig. 2, on a somewhat smaller scale than Fig. 2;Figs. 4 and 5 are features similar to Fig. 3, illustrating differentpositions of the valve; Fig. 6 is a side view of a movable member of thevalve; Fig. 7 is a bottom plan view of the movable member of the valve;Fig. 8 is a section on line 88 of Fig. 6 5 Fig. 9 is a section on linev99 of Fig-. 6; and Fig. 10 is asection on line 1Q10of Fig. 8.

Reference being had to the drawings, 1

represents the charging cylinder of an underfeed stok'er having pipes, 2and 3, con- I nected to opposite ends thereof for the pura adm tti was 2re tive fluids thereto and exhausting it therefrom.

4: represents mechanism of the type disclosed in the aforesaid patent,including a valve, and means for turning the valve step by step so as tocause the piston in the stoker cylinder to reciprocate at the desiredrate. The last element of the automatic controlling mechanism for thevalve is a driven shaft, 5, which, in the present instance, forms thestem of the rotary member, 6, of the valve to which the presentinvention particularly relates. The member, 6, is in the form of acylinder fitting revolubly into a cylindrical. bore, 7, in a stationaryvalve casing, 8. The stem, 5, projects out through a suitable stuffingbox at the front end of the valve casing. The member, 6, is providedwith an annular projection, 9, on its rear end, this projection fittinginto an annular groove, 10, in the rear wall of the valve casing. Aspring, 11, surrounding the stem, 5, at a point within the casing,serves to press the member, 6, rearwardly and thus maintain a tightjoint between the rear end thereof and the valve casing.

The rear wall of the valve casing is provided with a port, 12, ofconsiderable diameter coaxial with the member 6, and, connected to thisport, is the supply pipe, 13, for the motive fluid. 'Near the rear endof the member, 6, and distributed circumferentially about the same aretwo ports, 1 1 and 15, formed in the valve casing; these ports beingseparated from each other, in the arrangement illustrated, a distanceequal to the circumferential width of one of the ports and lying in thesame transverse plane. In the valve casing, in frontof the ports, 14.and 15, and midway between the same, 1s a third port, 17. The ports, 14and 15, are connected respectively to the pipes, 2 and 3, leading to thestoker cylinder. The port, 17 communicates with the waste pipe orexhaust pipe, 18.

In the rear end of the movable member, 6, of the valve is a port, 20,whose outer end registers with the port, 12, .in the ,caslng and whichextends inwardly and laterally so as to bring its inner end at thecylindrical surface of the member, 6, and in position to registersuccessively with the ports, 14: and '15, as the movable member of thevalve is rotated. The periphery of the member, 6,

at are? thr gh- 1. sees w t Patented Dec. 12, 1916.

tire length so as to leave only narrow flangelike unmutilated portions,21 and 22, at the ends of the member,together with a portion,

'23,- of full radius completely surrounding from the supply pipe throughthe passage,

20, into'the pipe, 2, leading to the left hand end of the ram cylinder.At the same time the port or passage around the exterior of the movablevalve member, which I shall designate by the reference character 25,connects together the ports 15 and 17, or, in other words, connects theright hand side of the ram cylinder to the discharge pipe, 18.Consequently, the piston in the cylinder is caused to move from the lefthand end to the right hand end. The automatic mechanism rotates themovablemember of the valve step by step until finally the port 14, isconnected to the exhaust port while the port, 15, is connected to thesupply port; Fig.4 showing the conditions of the parts when there is afull opening between the supply pipe and the pipe leading to the righthand end of the cylinder. The piston in the ram cylinder is now forcedtoward the left. As the step by step rotation of the valve continues,port, 15, isdisconnected from the supply side of the valve and is connected to the exhaust side so that both ends of the ram cylinder areconnected to exhaust, as indicated in Fig. 5. This condition ismaintained until the member, 6, is carried through a sufficient angle tobring the port, 20, into registration with the ort, 14, thus connectingthe left hand side 0 the ram cylinder to the supply pipe.

It will be seen that my improved construction provides large passages sodisposed that fluids will flow through them without encountering anygreat resistance; this result being obtained without making the valvelarge and cumbersome. The valve may be used to advantage where themotive fluid is steam, but it will be found to be particularly usefulwhere the motive fluid is water under pressure, because water travelsmore slowly than steam and, in order to secure good results, largepassageways should be provided, both for admittingit to the ram cylinderand for allowing it to escape therefrom.

While I have illustrated and described in detail only a single preferredform of my invention, I do not desire to be limited to the structuraldetails thus illustrated and described; but intend to cover all formsand arrangements which come within the terms employed in the definitionof my invention constituting the appended claims.

I claim:

1. In a device of the character described, a casing having a cylindricalbore, a rotatable member fitting in said bore, a stem projecting fromone end of said member out ofthe casing, said casing having an inletopening arranged axially of and at the opposite end of said member, saidcasing also having three ports disposed circumferentially with respectto said member, said member having a passageway extending through thebody thereof, adapted to connect the said inlet opening successively totwo of the other ports as said member is rotated, and said member havingportions cut away at the surface thereof to form an exterior passageadapted to connect the third of said circumferentially disposed portssuccessively with the other two circumferentially disposed ports andthereafter maintain said three ports in communication with each otherduring a considerable portion of each rotation of said member, saidrotatable member at all times shutting off communication between theinlet opening and said third port.

2. In a device of the character described, a valve casing having acylindrical bore, a rotatable valve member fitting in said bore, aninlet pipe connected to one end of said bore at the axis thereof, anexhaust pipe connected to the casing and opening into the side of thebore, two delivery pipes c0nnected to the casing and opening into theside of the bore, said rotatable member being constructed and arrangedto connect said inlet pipe successively to said delivery pipes and thedelivery pipes successively to the exhaust pipe and maintain aconnection between both delivery pipes and the exhaust pipe during aconsiderable portion of each revolution of said member, said rotatablemember at all times shutting off communication between the inlet openingand said third port.

3. In a device of the character described, a casing having a cylindricalbore, a rotatable memberfitting in said bore, a stem projecting from oneend of said member out of the casing, said casing having an inletopening arranged axially of and at the opposite end of said member, saidcasing also having three ports disposed circumferentially with respectto said member, said rotatable member being constructed and arranged tocomplete the following cycle during each revolution, at all timespreventing communication between said inlet opening and the th rd f saiports: connect the inlet open- 30 ing to the first of said ports and thesecond of said ports to the third port connect said second port to theinlet opening and the first port to the third port; and disconnect saidsecond port from the inlet opening and connect it with the third portwhile maintaining the connection between the latter port and the firstport.

i. In a device of the character described, a casing having a cylindricalbore, a rotatable member fitting in said bore, a stem projecting fromone end of said member out of the casing, an annular rib on the otherend of said member, the casing having an annular groove for thereception of said rib, a spring acting on said member for pressing saidrib into said groove, said casing having an inlet opening arrangedaxially of and at the opposite end of said member from said stem, saidcasing also having a plurality of ports disposed circumferentially withrespect to said member, said member being constructed and arranged toconnect the said inlet opening successively to certain of the said portsand to connect each of the latter ports to the remaining port as saidmember is revolved, said rotatable member at all times shutting offcommunication between the inlet opening and said third port.

In testimony whereof, I sign this specification in the presence of twowitnesses.

WILLIAM J. KENNEY.

Witnesses:

MARGARET FALAHEE, H. G. TRACY.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, I). G.

